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Corrections & Amplifications

Updated Feb. 26, 2011 12:01 a.m. ET

Young Islamist extremists from Libya fought against U.S. forces in Iraq, according to documents uncovered by U.S. soldiers in 2007. In some editions Friday, a World News article about concerns over Libya's power void incorrectly said in one reference that those extremists had fought the U.S. in Iran.

Brockhouse Cooper is a Montreal-based brokerage firm. Friday's Ahead of the Tape incorrectly said it is based in Toronto....